These are the plates that are in the water pump of all 63-68 V8 engines - they are a factory part used to divide and guide the flow of the coolant and are a must in the engine. These are often bent and rusted between the gaskets causing holes and the fluid to leak through the plates and can cause coolant leaks the water pump. This is a brand new inline tube reproduction of this difficult to find part. These are exact to the factory originals and Zinc plated so they will never rust again.